Afton Alps · United States
Rosie's Run
Black (advanced)
41
Very good
294 m
Length
55 m
Vertical drop
296 m
Starts at
241 m
Ends at
18.3%
Avg gradient
35.7%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Rosie's Run is a black (advanced) run at Afton Alps measuring 294 m, dropping 55 m from 296 m down to 241 m. It averages a 18.3% gradient, steepening to around 35.7% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 41/100 — Very good
Vertical2/30
Length1/25
Gradient character17/25
Flow20/20
Scored from the run's real geometry — steepness is judged against what a black (advanced) run should feel like, so every difficulty class can reach 100. Methodology
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